Studies in temperate regions have demonstrated that genetic differences between individual trees affect the ecological communities and ecosystem processes associated with them. Now scientists at Manchester University and Kew have examined the extent to which this phenomenon occurs between genetic variants of a single tree species in a diverse complex ecosystem such as a tropical forest.

When they looked closer

The team assessed the influence of within-species genetic variation in the tree Brosimum alicastrum (Moraceae) on the epiphytic and invertebrate communities associated with individual trees in a Neotropical rainforest. They found a significant relationship between the genetic distance between trees and the specific communities of the epiphytic plants growing on them, the invertebrates living in the leaf litter around their bases, and the invertebrates living on their trunks. The more genetically similar trees were, the more similar were the epiphyte and invertebrate communities living on and under them.

Implications

These observations have profound implications for whole ecosystem conservation management, since maintaining sufficient genetic diversity at the primary producer level will enhance species diversity of other plants and animals in the same habitat.

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